snippet #       可执行标识
	#!/usr/bin/env bash
	${0}
snippet /       单行注释
	# ${0}
snippet -       分隔注释
	#----------------------------------------------------------------------${0}
snippet doc     heredoc
	<<${1:HEREDOC}
	${0}
	$1
# 复合结构
snippet f       函数定义
	function ${1:f_name} {
	    ${0}
	}
# 流程控制
snippet if      if
	if [ ${1} ]
	then
	    ${0}
	fi
snippet elif    elif
	elif [ ${1} ]
	then
	    ${0}
snippet el      else
	else
	    ${0}
snippet th      then
	then
	    ${0}
snippet fo      for循环
	for ${0}
snippet fi      for .. in
	for ${1} in ${0}
snippet wh      while循环
	while ${0}
snippet ut      until循环
	until ${0}
snippet sel     select .. in
	select ${1} in ${0}
snippet do      do .. done
	do
	    ${0}
	done
snippet cs      case .. in
	case ${1} in
	    ${0}
	esac
snippet def     default
	default ${0};
# 单个关键字
snippet exp     导出环境变量
	export ${0}
snippet lo      局部变量
	local ${0}
snippet br      中断
	break${0}
snippet co      继续
	continue${0}
snippet re      返回
	return ${0}
snippet ex      退出并返回状态码
	exit ${0}
snippet al      别名
	alias ${1}=${0}
snippet ual     取消别名
	unalias ${0}
snippet l       赋值
	let ${0}
snippet s       设置
	set ${0}
snippet d       声明
	declare ${0}
snippet r       输入
	read ${0}
snippet e       输出
	echo ${0}
snippet pi      print
	print ${0}
snippet pf      printf
	printf ${0}
# 其他
snippet x       $[ .. ]
	$[ ${0} ]
snippet y       $(( .. ))
	$(( ${0} ))
